Restor Dent Endod.  2018 Feb;43(1):e3. 10.5395/rde.2018.43.e3.

Root canal volume change and transportation by Vortex Blue, ProTaper Next, and ProTaper Universal in curved root canals

• Park HJ
• Seo MS
• Moon YM

• KMID: 2406088
• DOI: http://doi.org/10.5395/rde.2018.43.e3

Abstract

OBJECTIVES
The aim of this study was to compare root canal volume change and canal transportation by Vortex Blue (VB; Dentsply Tulsa Dental Specialties), ProTaper Next (PTN; Dentsply Maillefer), and ProTaper Universal (PTU; Dentsply Maillefer) nickel-titanium rotary files in curved root canals.
MATERIALS AND METHODS
Thirty canals with 20°-45° of curvature from extracted human molars were used. Root canal instrumentation was performed with VB, PTN, and PTU files up to #30.06, X3, and F3, respectively. Changes in root canal volume before and after the instrumentation, and the amount and direction of canal transportation at 1, 3, and 5 mm from the root apex were measured by using micro-computed tomography. Data of canal volume change were statistically analyzed using one-way analysis of variance and Tukey test, while data of amount and direction of transportation were analyzed using Kruskal-Wallis and Mann-Whitney U test.
RESULTS
There were no significant differences among 3 groups in terms of canal volume change (p > 0.05). For the amount of transportation, PTN showed significantly less transportation than PTU at 3 mm level (p = 0.005). VB files showed no significant difference in canal transportation at all 3 levels with either PTN or PTU files. Also, VB files showed unique inward transportation tendency in the apical area.
CONCLUSIONS
Other than PTN produced less amount of transportation than PTU at 3 mm level, all 3 file systems showed similar level of canal volume change and transportation, and VB file system could prepare the curved canals without significant shaping errors.

Keyword

Canal volume; ProTaper Next; ProTaper Universal; Transportation; Vortex Blue; X-ray micro-computed tomography

MeSH Terms

Dental Pulp Cavity*
Humans
Molar
Transportation*
X-Ray Microtomography

Figure

• 

  Figure 1. Superimposition of cross-sectional micro-computed tomography (micro-CT) scans before (red) and after (green) the instrumentation for calculating root canal transportation. X is the shortest distance from canal edge to the outside edge of the root, and Y is the shortest distance from canal edge to the inside edge of the root.

• 

  Figure 2. Representative 3-dimensional reconstructed micro-computed tomography (micro-CT) images of each group. Before (upper side) and after (lower side) the instrumentation. (A) Vortex Blue, (B) ProTaper Next, and (C) ProTaper Universal.

• 

  Figure 3. Representative sectional images at the level of 1, 3, and 5 mm from the apex (from top to bottom) of each group. Before (red: left side), after (green: middle side) the instrumentation, and superimposition of the 2 images (right side). (A) Vortex Blue, (B) ProTaper Next, and (C) ProTaper Universal.

Reference

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